Compatibility Overview
Electric Yellow Cichlid and Oscar are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
| Factor | Electric Yellow Cichlid | Oscar | Verdict |
|---|---|---|---|
| Temperature | 75–82°F | 74–81°F | ✅ 75–81°F |
| pH Range | 7.5–8.5 | 6.0–8.0 | ⚠️ 7.5–8.0 (narrow) |
| Temperament | aggressive | aggressive | ❌ Risk |
| Adult Size | 2.4 in | 14 in | ❌ 6× difference |
| Min. Group | 1+ | 1+ | See below |
| Min. Tank Size | 100 gallons (for both species) | — | |
✅ Compatibility Positives
❌ Incompatibility Reasons
Species Profiles
Electric Yellow Cichlid — Aquarium species
The Electric Yellow Cichlid is a popular freshwater species known for its striking yellow coloration and moderate aggression. It requires a spacious tank with hiding spots and is best kept with peaceful tankmates. This species is suitable for beginner aquarists.
→ Full Electric Yellow Cichlid care guide
Oscar — Astronotus ocellatus
Intelligent but aggressive cichlids that will eat any fish small enough to fit in their mouth. Require large tanks (75+ gallons) and robust tank mates.
Frequently Asked Questions
Can Electric Yellow Cichlid live with Oscar?
Generally not recommended. Electric Yellow Cichlid and Oscar are generally not recommended to be housed together. The issues listed above — whether water parameter incompatibility, predation risk, or aggression — create conditions where one or both fish are likely to suffer harm or chronic stress.
What tank size do I need for Electric Yellow Cichlid and Oscar together?
A minimum of 100 gallons is recommended for keeping Electric Yellow Cichlid and Oscar together. A larger tank improves water stability and reduces territorial conflict.
What temperature suits both Electric Yellow Cichlid and Oscar?
75–81°F
Is a Electric Yellow Cichlid aggressive toward a Oscar?
Electric Yellow Cichlid is aggressive and Oscar is aggressive. The adult size gap creates a meaningful predation risk.
Related Compatibility Guides
Compatibility score breakdown
The overall score is weighted across water chemistry, behavior, adult size, swimming zone, and social needs. A score is a planning aid—not a guarantee for individual fish.
| Factor | Score |
|---|---|
| Temperature | 86/100 |
| Ph | 50/100 |
| Temperament | 12/100 |
| Adult Size | 8/100 |
| Swim Zone | 68/100 |
| Social Needs | 92/100 |
Tank size scenarios
Use the scenario that matches the actual group sizes and temperament you plan to keep.
| Scenario | Tank | When it applies |
|---|---|---|
| Minimum viable | 100 gal | Only for the recommended minimum groups, mature filtration, and close monitoring. |
| Recommended community | 150 gal | Adds territory, swimming room, and a safer buffer for behavior. |
| Low-conflict setup | 180 gal | Best when keeping larger schools or reducing territorial pressure. |